updated container build

.github/workflows/build.yml

@@ -132,7 +132,7 @@ jobs:
           cd ${{ github.workspace }}/app-src
           dotnet publish --configuration Release --runtime linux-musl-arm64 --output  ${{ github.workspace }}/app-src/output/src -p:PublishReadyToRun=true -p:PublishReadyToRunShowWarnings=true --self-contained
           cd ${{ github.workspace }}/app-src/output
-          docker build --tag $PROJECT_NAME/app:latest --platform linux/arm64 --build-arg SRC=${{ github.workspace }}/app-src/output/src .
+          docker build --tag $PROJECT_NAME/app:latest --platform linux/arm64 --build-arg SRC=${{ github.workspace }}/app-src/output/src --file ${{ github.workspace }}/build/dockerfile .
           docker save $PROJECT_NAME/app:latest | gzip > ${{ github.workspace }}/assets/container.tar.gz
           rm -rf ${{ github.workspace }}/app-src/output
 

build/dockerfile

@@ -0,0 +1,13 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+ARG PLATFORM=linux/arm64
+
+FROM --platform=${PLATFORM} public.ecr.aws/docker/library/alpine:latest
+
+ARG SRC=src
+
+ADD ${SRC} /var/www/multi-az-app
+RUN apk --no-cache add curl libstdc++ libgcc
+
+EXPOSE 5000
+ENTRYPOINT [ "/var/www/multi-az-app/multi-az-application" ]